Stay in shape using the E51 Transfiit Chin Pull-up Bar. This piece of exercise equipment can be temporarily mounted to your door frame. You can use it for a variety of pull-ups. It can also go on the floor so you can work on your pushups and tricep dips. The bar has rubber caps on each end to prevent marring surfaces. You can position your hands in different spots, because it has foam grips in multiple spots.